/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:06:48,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:06:48,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:06:48,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:06:48,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:06:48,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:06:48,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:06:48,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:06:48,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:06:48,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:06:48,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:06:48,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:06:48,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:06:48,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:06:48,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:06:48,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:06:48,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:06:48,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:06:48,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:06:48,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:06:48,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:06:48,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:06:48,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:06:48,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:06:48,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:06:48,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:06:48,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:06:48,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:06:48,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:06:48,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:06:48,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:06:48,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:06:48,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:06:48,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:06:48,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:06:48,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:06:48,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:06:48,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:06:48,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:06:48,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:06:48,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:06:48,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 14:06:48,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:06:48,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:06:48,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:06:48,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:06:48,413 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:06:48,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:06:48,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:06:48,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:06:48,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:06:48,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:06:48,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:06:48,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:06:48,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:06:48,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:06:48,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:06:48,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:06:48,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:06:48,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:06:48,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:06:48,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:06:48,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:06:48,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:06:48,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:06:48,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:06:48,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:06:48,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:06:48,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:06:48,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:06:48,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:06:48,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:06:48,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:06:48,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:06:48,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:06:48,946 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:06:48,947 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:06:48,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 14:06:49,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02eb9bfc7/ef10dafcb1974eae890676a067298bfd/FLAG9e63cd4ea [2020-10-29 14:06:49,773 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:06:49,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 14:06:49,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02eb9bfc7/ef10dafcb1974eae890676a067298bfd/FLAG9e63cd4ea [2020-10-29 14:06:50,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02eb9bfc7/ef10dafcb1974eae890676a067298bfd [2020-10-29 14:06:50,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:06:50,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:06:50,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:06:50,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:06:50,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:06:50,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:50,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a6d944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50, skipping insertion in model container [2020-10-29 14:06:50,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:50,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:06:50,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:06:50,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:06:50,688 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:06:50,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:06:50,895 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:06:50,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50 WrapperNode [2020-10-29 14:06:50,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:06:50,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:06:50,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:06:50,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:06:50,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:50,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:50,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:50,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:51,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:51,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:51,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... [2020-10-29 14:06:51,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:06:51,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:06:51,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:06:51,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:06:51,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:06:51,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:06:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:06:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:06:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:06:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:06:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:06:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:06:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:06:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:06:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:06:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 14:06:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:06:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:06:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:06:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:06:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:06:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:06:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:06:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:06:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:06:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:06:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:06:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:06:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:06:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:06:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:06:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:06:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:06:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:06:52,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:06:52,745 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:06:52,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:06:52 BoogieIcfgContainer [2020-10-29 14:06:52,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:06:52,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:06:52,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:06:52,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:06:52,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:06:50" (1/3) ... [2020-10-29 14:06:52,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183bc9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:06:52, skipping insertion in model container [2020-10-29 14:06:52,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:50" (2/3) ... [2020-10-29 14:06:52,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183bc9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:06:52, skipping insertion in model container [2020-10-29 14:06:52,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:06:52" (3/3) ... [2020-10-29 14:06:52,761 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 14:06:52,774 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:06:52,783 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:06:52,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:06:52,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:06:52,830 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:06:52,830 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:06:52,830 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:06:52,830 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:06:52,831 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:06:52,831 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:06:52,831 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:06:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states. [2020-10-29 14:06:52,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 14:06:52,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:06:52,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:06:52,879 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:06:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:06:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash -561736880, now seen corresponding path program 1 times [2020-10-29 14:06:52,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:06:52,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111968218] [2020-10-29 14:06:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:06:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:53,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:53,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:54,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:55,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:55,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:58,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:58,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 14:06:58,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 14:06:58,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-29 14:06:58,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:58,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:58,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:06:58,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-29 14:06:58,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 14:06:58,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 14:06:59,260 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:06:59,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:06:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:59,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:59,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:06:59,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:06:59,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 14:06:59,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:59,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:59,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:06:59,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:06:59,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:06:59,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:06:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:06:59,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111968218] [2020-10-29 14:06:59,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:06:59,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:06:59,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246245306] [2020-10-29 14:06:59,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:06:59,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:06:59,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:06:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:06:59,453 INFO L87 Difference]: Start difference. First operand 359 states. Second operand 4 states. [2020-10-29 14:07:00,320 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-29 14:07:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:03,349 INFO L93 Difference]: Finished difference Result 667 states and 1143 transitions. [2020-10-29 14:07:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:07:03,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-29 14:07:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:03,371 INFO L225 Difference]: With dead ends: 667 [2020-10-29 14:07:03,372 INFO L226 Difference]: Without dead ends: 497 [2020-10-29 14:07:03,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-29 14:07:03,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 493. [2020-10-29 14:07:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-29 14:07:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 814 transitions. [2020-10-29 14:07:03,540 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 814 transitions. Word has length 123 [2020-10-29 14:07:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:03,541 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 814 transitions. [2020-10-29 14:07:03,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:07:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 814 transitions. [2020-10-29 14:07:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 14:07:03,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:03,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:03,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:07:03,548 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash -871423583, now seen corresponding path program 1 times [2020-10-29 14:07:03,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:03,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589560469] [2020-10-29 14:07:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:03,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:08,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:08,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:08,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:08,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-29 14:07:08,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:07:08,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 14:07:08,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:08,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:08,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:07:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:07:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 14:07:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:09,430 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:07:09,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:09,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:09,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:09,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:09,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 14:07:09,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:09,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:09,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:09,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:09,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:09,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:09,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589560469] [2020-10-29 14:07:09,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:09,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:07:09,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902521055] [2020-10-29 14:07:09,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:07:09,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:07:09,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:09,552 INFO L87 Difference]: Start difference. First operand 493 states and 814 transitions. Second operand 5 states. [2020-10-29 14:07:12,610 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:07:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:12,820 INFO L93 Difference]: Finished difference Result 1409 states and 2323 transitions. [2020-10-29 14:07:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:07:12,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-29 14:07:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:12,834 INFO L225 Difference]: With dead ends: 1409 [2020-10-29 14:07:12,834 INFO L226 Difference]: Without dead ends: 945 [2020-10-29 14:07:12,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:07:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2020-10-29 14:07:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 942. [2020-10-29 14:07:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2020-10-29 14:07:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1546 transitions. [2020-10-29 14:07:12,920 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1546 transitions. Word has length 126 [2020-10-29 14:07:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:12,920 INFO L481 AbstractCegarLoop]: Abstraction has 942 states and 1546 transitions. [2020-10-29 14:07:12,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:07:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1546 transitions. [2020-10-29 14:07:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-29 14:07:12,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:12,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:12,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:07:12,925 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:12,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1746094317, now seen corresponding path program 1 times [2020-10-29 14:07:12,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:12,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324676521] [2020-10-29 14:07:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:13,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:13,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:13,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:13,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:17,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:18,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:18,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 14:07:18,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:07:18,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-29 14:07:18,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:18,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:07:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:07:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 14:07:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:19,015 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:07:19,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:19,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:19,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:19,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:19,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:19,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 14:07:19,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:19,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:19,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:19,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324676521] [2020-10-29 14:07:19,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:19,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:07:19,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316997869] [2020-10-29 14:07:19,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:07:19,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:07:19,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:19,151 INFO L87 Difference]: Start difference. First operand 942 states and 1546 transitions. Second operand 5 states. [2020-10-29 14:07:22,266 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:07:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:22,440 INFO L93 Difference]: Finished difference Result 2744 states and 4500 transitions. [2020-10-29 14:07:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:07:22,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-29 14:07:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:22,453 INFO L225 Difference]: With dead ends: 2744 [2020-10-29 14:07:22,453 INFO L226 Difference]: Without dead ends: 1833 [2020-10-29 14:07:22,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:07:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2020-10-29 14:07:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1830. [2020-10-29 14:07:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2020-10-29 14:07:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2985 transitions. [2020-10-29 14:07:22,582 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2985 transitions. Word has length 127 [2020-10-29 14:07:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:22,585 INFO L481 AbstractCegarLoop]: Abstraction has 1830 states and 2985 transitions. [2020-10-29 14:07:22,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:07:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2985 transitions. [2020-10-29 14:07:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-29 14:07:22,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:22,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:22,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:07:22,594 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash 651008372, now seen corresponding path program 1 times [2020-10-29 14:07:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:22,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328115059] [2020-10-29 14:07:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:22,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:22,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:22,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:25,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:27,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:27,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-29 14:07:27,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:07:27,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 14:07:27,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:27,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:27,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:07:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:07:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 14:07:27,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:28,384 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:07:28,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:28,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:28,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:28,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:28,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:07:28,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:28,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:28,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:28,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:28,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:28,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:28,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328115059] [2020-10-29 14:07:28,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:28,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:07:28,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825532184] [2020-10-29 14:07:28,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:07:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:07:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:28,496 INFO L87 Difference]: Start difference. First operand 1830 states and 2985 transitions. Second operand 5 states. [2020-10-29 14:07:31,502 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:07:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:31,678 INFO L93 Difference]: Finished difference Result 5318 states and 8671 transitions. [2020-10-29 14:07:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:07:31,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-29 14:07:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:31,700 INFO L225 Difference]: With dead ends: 5318 [2020-10-29 14:07:31,701 INFO L226 Difference]: Without dead ends: 3559 [2020-10-29 14:07:31,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:07:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2020-10-29 14:07:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 3556. [2020-10-29 14:07:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3556 states. [2020-10-29 14:07:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5763 transitions. [2020-10-29 14:07:31,983 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5763 transitions. Word has length 128 [2020-10-29 14:07:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:31,984 INFO L481 AbstractCegarLoop]: Abstraction has 3556 states and 5763 transitions. [2020-10-29 14:07:31,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:07:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5763 transitions. [2020-10-29 14:07:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 14:07:31,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:31,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:31,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:07:31,994 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:31,995 INFO L82 PathProgramCache]: Analyzing trace with hash 589736372, now seen corresponding path program 1 times [2020-10-29 14:07:31,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:31,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426665470] [2020-10-29 14:07:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:32,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:32,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:32,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:32,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:33,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:33,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:37,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:37,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-29 14:07:37,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:07:37,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 14:07:37,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:37,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:37,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:07:37,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-29 14:07:37,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 14:07:37,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:37,842 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:07:37,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:37,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:37,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:37,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:37,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:07:37,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:37,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:37,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426665470] [2020-10-29 14:07:37,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:37,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:07:37,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308617536] [2020-10-29 14:07:37,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:07:37,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:37,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:07:37,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:07:37,924 INFO L87 Difference]: Start difference. First operand 3556 states and 5763 transitions. Second operand 4 states. [2020-10-29 14:07:38,644 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-29 14:07:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:41,000 INFO L93 Difference]: Finished difference Result 7810 states and 12847 transitions. [2020-10-29 14:07:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:07:41,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-29 14:07:41,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:41,034 INFO L225 Difference]: With dead ends: 7810 [2020-10-29 14:07:41,034 INFO L226 Difference]: Without dead ends: 5607 [2020-10-29 14:07:41,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2020-10-29 14:07:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 5588. [2020-10-29 14:07:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5588 states. [2020-10-29 14:07:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 9123 transitions. [2020-10-29 14:07:41,359 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 9123 transitions. Word has length 129 [2020-10-29 14:07:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:41,361 INFO L481 AbstractCegarLoop]: Abstraction has 5588 states and 9123 transitions. [2020-10-29 14:07:41,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:07:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 9123 transitions. [2020-10-29 14:07:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-29 14:07:41,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:41,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:41,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:07:41,373 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1562270930, now seen corresponding path program 1 times [2020-10-29 14:07:41,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:41,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977980738] [2020-10-29 14:07:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:41,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:43,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:44,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:46,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:07:46,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 14:07:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:47,301 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:07:47,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:47,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:47,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:47,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:47,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:47,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 14:07:47,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:47,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:47,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:47,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977980738] [2020-10-29 14:07:47,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:47,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:07:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344873759] [2020-10-29 14:07:47,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:07:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:07:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:47,430 INFO L87 Difference]: Start difference. First operand 5588 states and 9123 transitions. Second operand 5 states. [2020-10-29 14:07:51,017 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:07:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:51,370 INFO L93 Difference]: Finished difference Result 16216 states and 26452 transitions. [2020-10-29 14:07:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:07:51,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-29 14:07:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:51,425 INFO L225 Difference]: With dead ends: 16216 [2020-10-29 14:07:51,425 INFO L226 Difference]: Without dead ends: 10973 [2020-10-29 14:07:51,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:07:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10973 states. [2020-10-29 14:07:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10973 to 10970. [2020-10-29 14:07:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10970 states. [2020-10-29 14:07:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 17844 transitions. [2020-10-29 14:07:52,188 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 17844 transitions. Word has length 132 [2020-10-29 14:07:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:52,189 INFO L481 AbstractCegarLoop]: Abstraction has 10970 states and 17844 transitions. [2020-10-29 14:07:52,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:07:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 17844 transitions. [2020-10-29 14:07:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-29 14:07:52,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:52,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:07:52,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:07:52,208 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash 986879940, now seen corresponding path program 1 times [2020-10-29 14:07:52,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:52,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629023476] [2020-10-29 14:07:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:52,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:52,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:52,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:52,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:54,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:54,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:54,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:57,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:57,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-29 14:07:57,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:07:57,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 14:07:57,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:57,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:57,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:07:57,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:07:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-29 14:07:57,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:07:58,029 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:07:58,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:58,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:58,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:58,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:58,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:58,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:07:58,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:58,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:58,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:58,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:58,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:58,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:07:58,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629023476] [2020-10-29 14:07:58,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:58,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:07:58,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808719203] [2020-10-29 14:07:58,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:07:58,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:07:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:58,182 INFO L87 Difference]: Start difference. First operand 10970 states and 17844 transitions. Second operand 5 states. [2020-10-29 14:08:01,729 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:08:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:02,361 INFO L93 Difference]: Finished difference Result 31945 states and 51938 transitions. [2020-10-29 14:08:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:08:02,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-10-29 14:08:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:02,411 INFO L225 Difference]: With dead ends: 31945 [2020-10-29 14:08:02,411 INFO L226 Difference]: Without dead ends: 21277 [2020-10-29 14:08:02,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:08:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21277 states. [2020-10-29 14:08:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21277 to 21274. [2020-10-29 14:08:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21274 states. [2020-10-29 14:08:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21274 states to 21274 states and 34362 transitions. [2020-10-29 14:08:03,571 INFO L78 Accepts]: Start accepts. Automaton has 21274 states and 34362 transitions. Word has length 133 [2020-10-29 14:08:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:03,571 INFO L481 AbstractCegarLoop]: Abstraction has 21274 states and 34362 transitions. [2020-10-29 14:08:03,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:08:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 21274 states and 34362 transitions. [2020-10-29 14:08:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-29 14:08:03,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:03,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:08:03,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:08:03,601 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:03,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1172127027, now seen corresponding path program 1 times [2020-10-29 14:08:03,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:03,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808774256] [2020-10-29 14:08:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:03,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:03,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:04,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:04,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:04,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:04,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:05,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:05,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:08,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:08,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 14:08:08,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:08:08,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 14:08:08,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:08,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:08,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:08:08,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:08:08,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-29 14:08:08,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:09,497 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:08:09,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:09,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:09,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:09,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:08:09,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808774256] [2020-10-29 14:08:09,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:09,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:08:09,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342643639] [2020-10-29 14:08:09,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:08:09,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:09,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:08:09,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:09,574 INFO L87 Difference]: Start difference. First operand 21274 states and 34362 transitions. Second operand 5 states. [2020-10-29 14:08:13,451 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:08:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:14,626 INFO L93 Difference]: Finished difference Result 62490 states and 100897 transitions. [2020-10-29 14:08:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:08:14,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-29 14:08:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:14,747 INFO L225 Difference]: With dead ends: 62490 [2020-10-29 14:08:14,747 INFO L226 Difference]: Without dead ends: 41549 [2020-10-29 14:08:14,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:08:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41549 states. [2020-10-29 14:08:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41549 to 41546. [2020-10-29 14:08:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41546 states. [2020-10-29 14:08:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41546 states to 41546 states and 66638 transitions. [2020-10-29 14:08:17,319 INFO L78 Accepts]: Start accepts. Automaton has 41546 states and 66638 transitions. Word has length 134 [2020-10-29 14:08:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:17,319 INFO L481 AbstractCegarLoop]: Abstraction has 41546 states and 66638 transitions. [2020-10-29 14:08:17,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:08:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41546 states and 66638 transitions. [2020-10-29 14:08:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-29 14:08:17,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:17,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:08:17,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:08:17,367 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1946822008, now seen corresponding path program 1 times [2020-10-29 14:08:17,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:17,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733399470] [2020-10-29 14:08:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:17,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:18,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:18,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:18,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:19,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:22,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:22,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-29 14:08:22,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:08:22,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-29 14:08:22,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:22,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:22,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:08:22,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 14:08:22,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 14:08:22,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:23,137 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:08:23,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:23,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:23,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:23,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:23,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:23,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 14:08:23,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:23,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:23,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:08:23,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733399470] [2020-10-29 14:08:23,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:23,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:08:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147018657] [2020-10-29 14:08:23,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:08:23,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:08:23,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:08:23,197 INFO L87 Difference]: Start difference. First operand 41546 states and 66638 transitions. Second operand 4 states. [2020-10-29 14:08:23,913 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-29 14:08:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:29,660 INFO L93 Difference]: Finished difference Result 102480 states and 166482 transitions. [2020-10-29 14:08:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:08:29,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-29 14:08:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:29,790 INFO L225 Difference]: With dead ends: 102480 [2020-10-29 14:08:29,790 INFO L226 Difference]: Without dead ends: 70861 [2020-10-29 14:08:29,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70861 states. [2020-10-29 14:08:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70861 to 70602. [2020-10-29 14:08:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70602 states. [2020-10-29 14:08:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70602 states to 70602 states and 113870 transitions. [2020-10-29 14:08:34,185 INFO L78 Accepts]: Start accepts. Automaton has 70602 states and 113870 transitions. Word has length 135 [2020-10-29 14:08:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:34,186 INFO L481 AbstractCegarLoop]: Abstraction has 70602 states and 113870 transitions. [2020-10-29 14:08:34,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:08:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 70602 states and 113870 transitions. [2020-10-29 14:08:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-29 14:08:34,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:34,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:08:34,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:08:34,450 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1879861973, now seen corresponding path program 1 times [2020-10-29 14:08:34,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:34,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381526050] [2020-10-29 14:08:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:34,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:34,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:39,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:39,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-29 14:08:39,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:08:39,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-29 14:08:39,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:39,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:39,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:08:39,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:08:39,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-29 14:08:39,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:40,282 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:08:40,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:40,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:40,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:40,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:40,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 14:08:40,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:40,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:40,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:40,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:40,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:40,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:08:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381526050] [2020-10-29 14:08:40,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:40,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:08:40,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962800710] [2020-10-29 14:08:40,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:08:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:08:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:40,355 INFO L87 Difference]: Start difference. First operand 70602 states and 113870 transitions. Second operand 5 states. [2020-10-29 14:08:46,332 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:08:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:52,984 INFO L93 Difference]: Finished difference Result 206646 states and 333176 transitions. [2020-10-29 14:08:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:08:52,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2020-10-29 14:08:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:53,401 INFO L225 Difference]: With dead ends: 206646 [2020-10-29 14:08:53,402 INFO L226 Difference]: Without dead ends: 138195 [2020-10-29 14:08:53,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:08:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138195 states. [2020-10-29 14:09:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138195 to 138192. [2020-10-29 14:09:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138192 states. [2020-10-29 14:09:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138192 states to 138192 states and 221938 transitions. [2020-10-29 14:09:03,187 INFO L78 Accepts]: Start accepts. Automaton has 138192 states and 221938 transitions. Word has length 138 [2020-10-29 14:09:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:09:03,187 INFO L481 AbstractCegarLoop]: Abstraction has 138192 states and 221938 transitions. [2020-10-29 14:09:03,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:09:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 138192 states and 221938 transitions. [2020-10-29 14:09:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-29 14:09:03,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:09:03,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:09:03,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 14:09:03,249 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:09:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:09:03,250 INFO L82 PathProgramCache]: Analyzing trace with hash -176734405, now seen corresponding path program 1 times [2020-10-29 14:09:03,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:09:03,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245564858] [2020-10-29 14:09:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:09:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:03,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:03,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:03,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:03,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:04,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:04,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:05,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:05,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:05,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:05,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:08,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:08,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-29 14:09:08,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:09:08,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-29 14:09:08,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:08,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:09:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:09:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 14:09:08,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:09,076 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:09:09,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:09:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:09,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:09,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:09,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:09:09,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:09:09,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 14:09:09,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:09,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:09:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:09:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:09:09,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:09:09,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245564858] [2020-10-29 14:09:09,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:09:09,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:09:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117770788] [2020-10-29 14:09:09,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:09:09,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:09:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:09:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:09:09,173 INFO L87 Difference]: Start difference. First operand 138192 states and 221938 transitions. Second operand 5 states. [2020-10-29 14:09:17,489 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:09:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:09:31,212 INFO L93 Difference]: Finished difference Result 404018 states and 648483 transitions. [2020-10-29 14:09:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:09:31,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-29 14:09:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:09:31,761 INFO L225 Difference]: With dead ends: 404018 [2020-10-29 14:09:31,761 INFO L226 Difference]: Without dead ends: 268269 [2020-10-29 14:09:32,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:09:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268269 states. [2020-10-29 14:09:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268269 to 268266. [2020-10-29 14:09:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268266 states. [2020-10-29 14:09:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268266 states to 268266 states and 427682 transitions. [2020-10-29 14:09:52,806 INFO L78 Accepts]: Start accepts. Automaton has 268266 states and 427682 transitions. Word has length 139 [2020-10-29 14:09:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:09:52,807 INFO L481 AbstractCegarLoop]: Abstraction has 268266 states and 427682 transitions. [2020-10-29 14:09:52,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:09:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 268266 states and 427682 transitions. [2020-10-29 14:09:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 14:09:52,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:09:52,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:09:52,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 14:09:52,948 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:09:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:09:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash 954521735, now seen corresponding path program 1 times [2020-10-29 14:09:52,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:09:52,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831719769] [2020-10-29 14:09:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:09:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:54,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:54,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:56,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:58,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:58,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-29 14:09:58,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:09:58,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 14:09:58,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:58,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:58,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:09:58,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:09:58,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-29 14:09:58,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:58,822 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:09:58,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:09:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:58,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:58,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:09:58,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:09:58,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831719769] [2020-10-29 14:09:58,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:09:58,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:09:58,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392272405] [2020-10-29 14:09:58,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:09:58,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:09:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:09:58,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:09:58,902 INFO L87 Difference]: Start difference. First operand 268266 states and 427682 transitions. Second operand 5 states. [2020-10-29 14:10:14,715 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 295